Shingle cutting and punching machine



Jan. 8, 1935. w. |1 WASHBURN 1,987,455

SHINGLE CUTTING AND PUNCHING MACHINE Filed Aug. 24, 1934 l 6 7 3s@ 4750/9 54 45 45 "35 .7559.55 Q @gli Q @wif g' Cif-? -J'-'--f-'--A tf/6 l Q f/19 J Jl@ 0 J' "f f' I A *9 l i [9 4 0l48 3 Patented Jan. 8, 1935 UNITED STATES PATENT OFFICE SHINGLE CUTTING AND PUNCHING MACHINE 4 Claims.

My invention relates to an improved shingle cutting and punching machine, particularly adapted for operating upon asbestos shingles.

The object of my invention is to provide a machine with a novel arrangement of the levers for moving the cutter bar.

A further object is to employ a toggle link having its opposite ends pivotally connected with the respective levers for insuring free movement of the levers and for reducing the friction. A further object is to simplify the construction of the base, including the end brackets and the bed piece.

A further object is to mount the cutting blades in a novel manner upon the bed piece and upon the movable cutter bar whereby the stock will free itself from the blades after the cutting action of the latter.

A further object is to provide a novel means for adjusting the bed piece upon the base for varying the relative position of the blades.

A further object is to provide a novel form of stop for limiting the length of cutting action of the blades.

A further object is to provide a punch upon one of said levers and to locate the punch adjacent to the center of the machine so that holes may be punched in any portion of the shingle.

A further object is to combine the punch with the toggle link which connects the levers.

A further object is to provide the movable cutter bar with a punch table with which the punch co-acts, and upon which the shingle may be freely turned to any position for punching openings of various shapes in the shingle.

These, together with various other arrangements and novel construction of the parts, which will be more fully hereinafter described and claimed, constitute my invention.

Referring to the accompanying drawing:-

Fig. 1 is a front elevation of my improved machine.

Fig. 2 is a view similar to Fig. 1 showing the parts in a different position.

Fig. 3 is a transverse vertical section on line 3 3 Fig. 2.

Fig. 4 is a transverse vertical section on line 4 4 Fig. 2.

Fig. 5 is a plan view of a shingle.

In the drawing, in which like reference characters refer to like parts, 6 represents a base comprising end brackets 7 and 8, rigidly held in spaced relation by a tie rod 9. Lugs 10 are formed upon the end brackets and upon said lugs is adjustably vsecured a bed piece 12.

vSaid ribs are placed in vthe ends of which'bar are The end brackets have ribs 14 formed thereon. spaced relation and form vertical guides 15 for the movable cutter bar 16, freely movable in said guides.

Cutter blades 18 and 19 are secured upon the bed piece 12 and upon the movable cutter bar 16. Said blades are of rectangular cross section, as shown in Fig. 4. Said blades extend approximately the length of thel bed piece 12 and the movable bar 16, as shown in Fig. 1. 'I'he movable blade 19 is inclined longitudinally'relatively to the bed piece 12, in the usual manner, as shown in Fig. 1.

The bed piece 12 is of angular cross section, as shown in Fig. 4, and comprises a horizontal member 21 and a vertical member 22. The vertical member has a longitudinal recess forming a facing surface 24 against which the blade 18 is secured. Said facing surface 24 is inclined at an oblique angle relatively to the vertical line of travel of the cutter head 16 which is movable vertically in the guides 15.

The cutter head 16 has a longitudinal recess forming a facing surface 25 against which the blade 19 is secured. Said facing surface 25 is inclined at an oblique angle relatively to the Verticalline of travel of the cutter head 16. Said inclined facing surfaces 24 andr 25 permit the cutting edges 26 and 27 of the blades 18 and 19 to be positioned in shearing relation, as shown in Fig. 4, and also position the rear edge portions 28 and 29 at av greater distance from the vertical plane extending between said cutting blades and parallel with the line of movement of the head 16. By thus positioning the blades at an angle relatively to the Vertical line of travel. as shown in Fig. 4, suiiicient clearance is provided between the rear edge portions v28 and 29 of the blades to free the stock after it has been cut, and the sticking and wedging of the stock between the blades is eliminated. The blades positioned in angular relation as above described are self sharpening.

The bed piece 12 is adjustable upon the end brackets 7 and 8 for varying the relation of the blades 18 and 19. The end pieces are provided with lugs 30, having threaded apertures formed therein to receive the adjusting screws 31. Said screws pass loosely through holes formed through the vertical member 22. The heads of the screws 31 engage said member 22. By rst loosening the bolts 32 and then turning the screws 31, the bed piece 12 may be moved by the screws 31 to bring the cutting edges of the blades in adjusted position.Y

The cutter bar 16 is operated by levers 34 and 35 pivotally mounted upon pivot pins 36, secured in bearings 38 formed upon the opposite end pieces. Each lever extends toward the center of the machine, as shown in Fig. l. The levers are slightly curved to permit their free ends to cross.

l The lever 34 is provided with an operating handle The levers 34 and 35 are pivotally associated with the cutter ybar 16 by links 41 located adjacent to the pivot pinsI 36 ofthe levers, and to the opposite ends of the cutter bar 16, in the usual manner.

The levers 34 and 35 are Acci'nnecte'din a novel manner, 'comprising a toggle link 45 having one end thereof pivoted upon a toggle vpin 46 mounted upon the lever 34 and its oppositev end pivoted upon a toggle pin 47 mounted-upon'the lever 35.

The lever 34 has rigidly secured thereto a bearing plate 48, one end of which plate extends below7 the lever 34 and -f-erms a-bearing for said pin 46, so that-therlink45 will beproperly positioned and impart amovement-to the lever 35, corresponding to the movement ofthe lever 34, for moving the cutter bar 16 vertically in the guides formed in-theend brackets.

-The'movable cutterhead 16 is formed of channel cross section, asshown-inFig. 4. The upper horizontal member` ofthe head 16 forms a punch table 50 upon whichthe shingle-maybe placed for punching small holes through the shingle.

A punch 52 is associated with the levers 34 and 35 in suchmanner that-when thelevers are moved down into'the position shown in Figs. 2 and-4,'the punch will enter -a-hole `formed in the punch tablef50.

In therformof my invention illustrated, the punch-52 is mounted lupon the lower end of the toggle -link 45. The link 45 and the bearing plate 4 8are arranged so that when the levers are moved downwardly the punch and the link 45 will be-moved to -a vertical position. The leversA 34 and 35 impart a greater movement to the punch than to the -cutter head'sothat-the punch will pass into the hole formed through the punch table 50, whenthepartssare moved to the position shown- `Figs.-2and 4.

d By placing `ashingleupon the punch table, as showninvdot and dash lines'atA' Fig. 2, the punchwill-form a holethrough the shingle. The punch -52-is located/upon the levers adjacent to the centerof thevlength ofthe table 50, so that by turning the shingle upon the table, any portion et the entire surface of the shingle may be brought under thepunch, -for punching nail holes 53, as shown'inFig. 5. By this arrangementva-rious shaped openings'may be made in the shingle, such as the Yellipse shown in-Fig. 5, which is made by -draw-ing'ra' liney upon the shingle the shape of the opening desired-and then rmoving the shingle relativelyl to thespunchfso that` a series of punch holeswill be 'made along the line drawn upon the shingle, yafter which the centerportion may be readily removedfrom the shingle.

-A novel form of stop I55 is-mounted upon the movable cutterbar =1-6. Said stop-is rotatably mounted upon-apin56 secured upon the bar 16. A thumb nut 57'` is provided for securing the stop in engaging position,=as shown in Fig. 1, or out of engaging position, asshown in Fig. 2.

When it is desired to cut` ashingle less than the entire length vof the same the shingle A, shown in dotand-dash lines' Fig. 1,isrplaced upon the bed piece-l2-and the stop A55 is :set so that its lower face 58 will take against the top surface -outrof enga'ging'position as shown in Fig. 2.

of the shingle when the cutter bar is lowered, and the stop will limit the length of the cutting action of the cutting blades. The stop 55 is provided with two stop faces 58 and 59, located at diierent distances from the pivot pin 56.

1f a short cut in the shingle such as shown at 60 Fig. 5, is desired, the stop is set so that the face 58 will take against the shingle. If a long cut 6l, inthe shingle is desired,the stopis set so that the face 59 will take against the shingle and thus limit the movement of the cutter bar. The

length of the cuts 60 or 61 may be further varied 'by placing the shingle at different positions relatively to the length of the bed piece 12.

YThe operation of my invention is as follows: The levers are moved by the handle 40 into the position shown in Fig. 1 with the stop 55 moved The shingle A is placed upon the bed piece 12 and the levers moved into the position shown in Fig. 2, so that the cuttingactionof the blades'will extendthe entire length of the shingle. LBy setting thestop 55 so that thestop faces A58 or 59 will take against the shingle the latter may be 'partially cut, as above described.

The free cutting` action of the cutting blades is insured by positioning the' cutting blades 18 and 1'9 at an oblique angle relatively to the line'of movement of the cutter head, as shown in Fig. 4.

By placing the shingle A upon the punch table 50, the downward movement of the handle 40, will'cause the punch 52'to entertheshingle for forming nail holes, or for forming a series 'of holes for making openings of various shapesthrough the shingle.

The effective operation 'of the machine is'greatly improved by connecting the levers 34 and .35by the toggle link 45, which arrangement reduces the friction betweenthe levers and the wearing of the parts andalso'insures a free `action of the levers. Heretofore shears of this character ernployed a toggle pin upon one of the levers, 'which pin occupied an'elongated slot formed in the op posite lever. This construction was-"subject to rapid wear, land the forming of the elongated slot in one lever was expensive to manufacture.

Various changes in the 'construction and operation of the several parts may be made Without departing from my invention.

1. The "combination of a base, end brackets upon the base, a vertically movable "cutter bar mounted in said brackets, levers'pivotally mounted at one of'their ends upon said brackets, a toggle link pivotally connected to one of said-levers, Aa bearinglplate upon the oppositelever, means pivotally connecting said link with saidbearing plate, and 'means operatively associating the levers with the cutting bar.

2. The combination of a base, end brackets upon the base, a vertically movable cutter bar mounted in said brackets, levers pivotally mounted at one of their ends upon said brackets, a link pivotally connected between said leversfor imparting relative movement to said levers, land a punch upon said link and movable to and from said cutter bar by the movement of said levers.

3. The combination of end brackets, levers pivotally mounted at one of thervends upon said brackets, a toggle link, pivot means upon the levers and pivotally connecting the oppositeends of said link with the opposite levers, a punch upon the lower end of said link, a-punch table upon said end brackets, and said pivot means so located upon the levers, and upon said link, as to position the punch perpendicular to the surface of the punch table when the levers are moved to bring the punch adjacent to the punch table.

4. The combination of a base, end brackets upon the base, a vertically movable cutter bar mounted in said brackets, levers pivotally mounted at one of their ends upon said brackets, means pivotally connecting the levers to each other,

means operatively associating the levers with the cutter bar, a stop member, a pivot pin upon the cutter bar upon which pin the said member is mounted, said member having stop faces located at different distances from said pivot pin, and means for securing said member in adjusted positions upon said pin.

WILBUR H. WASHBURN. 

